Why do peppers turn white leaves after planting in the ground or greenhouse: how to feed

One of the most common varieties of pepper is bell pepper, which is often used during the preparation of various dishes. This vegetable often suffers from various diseases that lead to lightening of the leaves growing on the bush. To get rid of white leaves, you need to figure out why pepper leaves turn white.

Main causes of the problem

There are several reasons why the leaves of pepper seedlings change color or start turning white. The main reason for the occurrence of such a symptom is the appearance of a fungal disease.

Black leg

The most common fungal disease that most vegetable growers encounter during greenhouse growing of pepper seedlings is blackleg. This disease can destroy most young seedlings. Especially if they are planted in a greenhouse with poor lighting and high levels of humidity.

Fungal infection spreads with the help of plant residues, poorly disinfected soil or untreated seeds. The main symptoms of blackleg include:

leaves on the bush brightened and stopped being green;
root collar darkens;
rotting plant stem.

Not only pepper seedlings are susceptible to the disease, but also an adult plant that grows in a greenhouse. During the defeat of adult bushes, their stem gradually turns dark brown.

Verticillium wilt

Sometimes the manifestations of this disease strongly resemble the symptoms of cucumber mosaic. These diseases are very similar, as they disrupt the vascular system of plants. The main symptoms of verticillium include:

plant grows slower;
pepper leaves shrink and turn pale;
over time, the leaf plate of the lower leaves turns yellow;
if young bushes were infected, then ovaries cease to form on them;
plants infected in the later stages of growth begin to shed their leaves.

Septoria

Disease damages the leaves of peppers, their fruits and stems. The fungus actively develops if the cultivation is carried out in a greenhouse with a temperature of about 25 degrees and an air humidity of more than 80-85%.First, septoria affects the lower part of the plant, which is why the old leaves are the first to suffer. White spots appear on them and over time some of them crumble.

Then septoria blight rises higher and infects younger leaves. In this case, the number of spots increases significantly. They appear in all veins of the leaf blade.

When the first white spots appear on the sheets, it is necessary to treat them with special preparations that contain copper.

Alternariosis

This disease manifests itself not only on the surface of the leaves of peppers in the greenhouse, but also on the fruits. First, small spots with a brownish tint form on them. Over time, they appear on the leaves that are located above. They gradually increase and begin to merge. If you do not get rid of Alternaria in a timely manner, then the green leaves will begin to dry.

When the stems are affected, brown oval spots form on them. Sometimes rot appears on them, due to which the leaves fall.

Cladosporiasis

The disease affects the ovary of pepper, stalks, petioles and leaves. The main symptoms of cladosporiosis include:

appearance of pale green spots, which are covered with a fungal coating on the outside;
rapid spread of the disease from the bottom of the bush to the top;
withering and drying of leaves after transplanting seedlings.

The spread of the disease is carried out through the remains of plants, contaminated tools and soil. A feature of cladosperiasis is that it is not transmitted through seeds.

White rot

Quite often, it is she who is the reason why pepper seedlings turn white leaves.The disease affects leaves located near the root zone of pepper. Also, over time, it appears on the fruits, because of which they become softer and more watery. The causative agent of white rot can be found in soil or plant debris.

To keep the leaves from turning white, you need to constantly monitor the humidity of the air, remove wilted leaves and stepchildren.

Means to fight diseases

Having determined the reason why pepper leaves turn white, you can begin to solve this problem. Many vegetable growers do not know what to do when the leaves with veins on the pepper bushes lighten up. You can get rid of this problem with the help of special drugs.

Alirin-B

This biological preparation helps to get rid of diseases such as septoria, cladosporiosis, alternariosis and late blight. Before use, it must be diluted in water.First, it is mixed with a small amount of liquid, after which it is poured into the total amount of water. If you need to water 10 square meters of the plot, 2 tablets of the drug are added to 10 liters of water. There are several ways to use Alirin-B:

Before planting seedlings in open ground. The solution is applied to the soil with a watering can and mixed with it. To do this, you can use a regular shovel or cutter.
Adding to wells. 300 g of working solution is added to one well. To create it, you need to add one tablet of Alirin-B to a liter of water.
Use during the growing season. During this period, the bushes are fed several times a month with an interval of 4-6 days.

Bordeaux liquid

Is one of the most effective remedies against bacterial and fungal diseases. To prepare the liquid, you need to add 250 grams of quicklime and copper sulfate to 7-8 liters of water.Before use, the mixture is thoroughly mixed and filtered through cheesecloth folded in several layers.

Properly prepared solution should not contain a lot of copper and have a light blue color. To check the acidity of the mixture, you should use an iron nail, which is lowered into the liquid for 3-5 minutes. If a red coating appears on it, then the mixture contains too much copper.

Quadris SK

It has protective properties, with which you can not only get rid of fungal diseases, but also prevent their occurrence.

It is recommended to use the drug after planting seedlings in the ground. At the same time, this should be done in the morning or in the evening, when there are no strong gusts of wind outside. Quadris SC penetrates the leaf blade and protects it from fungal diseases.

The drug is used in the form of an aqueous solution. To prepare it, 300 g of Quadris SK is added to 5 liters of water. Use the working mixture within 24 hours of preparation.

Trichodermin

With the help of this biological agent, you can get rid of many fungal diseases. The composition of the drug includes the soil fungus Trichoderma.

Trichodermin is used after planting seedlings for watering pepper bushes in a greenhouse. To prepare a working solution, you need to mix a liter of water with 10 grams of the drug. During watering, the liquid must be poured under the root of each bush.

The prepared solution can be stored in the refrigerator for up to one month.

Prevention

There are several recommendations that can be used to stop the development of fungal diseases on peppers.

Before planting seeds, they need to be disinfected. This can be done using heat treatment. To do this, a few weeks before planting the seeds, they will have to be placed in a weak solution of zinc for half an hour.In this case, the temperature of the liquid should be about 100 degrees. After that, the seeds can be cooled in cool water and dried.

You should also work on fertilizing the soil. To do this, the soil must be fed 2-3 times with a warm manganese solution. To prepare it, 5-7 grams of the drug is mixed with 10 liters of water.

Conclusion

You can get rid of various fungal diseases of bell pepper yourself. To do this, it is enough to figure out why the leaves of peppers can turn white and what drugs will help solve this problem.